Drop sensing device for monitoring intravenous fluid flow

Abstract

A drop sensing device for monitoring intravenous (IV) fluid flow is provided. The device comprises a U-shaped clip mountable on a drip chamber of an IV infusion set. The clip has a light source provided at one side for emitting radiation and a hollow cylinder provided in a through hole on the side opposite the light source. The cylinder includes an aperture of a diameter smaller than an average diameter of fluid drops passing the drip chamber, and an optical sensor mounted on a rear end of the cylinder opposite the aperture, so as to substantially enhance sensitivity of light ray receiving.

1 . A drop sensing device for monitoring intravenous (IV) fluid flow, comprising a U-shaped clip mountable on a drip chamber of an IV infusion set and having a light source provided at one side for emitting radiation; wherein a hollow cylinder is provided in a through hole on the side opposite the light source and includes an aperture through a front end aligned with the light source, the aperture having a diameter smaller than an average diameter of fluid drops passing the drip chamber, and an optical sensor mounted on a rear end of the cylinder opposite the aperture. 
   
   
       2 . The drop sensing device of  claim 1 , wherein the cylinder further comprises an internal guide formed around the inner mouth of the aperture for substantially increasing strength of light ray receiving from the light source. 
   
   
       3 . The drop sensing device of  claim 1 , wherein an inner surface of the cylinder is plated with a reflective layer for increasing reflection of light ray entering the aperture so as to enhance sensitivity of light ray receiving.